Duplicating machine



April 21, 193. M HQRST 2,038,177

DUPLICATING MACHINE Filed June 6, 1955 2.Sheets'-Sheet 1 v PM Que WW April 21, 1936. HURST 2,038,177

DUPLICATING MACHINE Filed June 6, 1935 2 Sheets-Sheet 2 4/ I 5 I W Marshal[ Hum 1 Patented Apr. 21, 1936 UNITED STATES PATENT OFFICE 7 Claims.

This invention relates to a duplicating machine of the type wherein gelatinous means is used to receive and transfer an impression.

It is particularly aimed to provide a novel 1 means whereby substantially perfect contact and even pressure is assured between the platen and the paper, a construction wherein a stack of papers in exact position for printing is accommodated; and to generally improve, simplify and render more eflicient, the construction and operation of a machine of this general character.

The more specific objects and advantages will I in part be pointed out and otherwise become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiiment.

In said drawings:

Figure 1 is a plan view of the duplicator, with the cover removed;

Figure 2 is a right hand end elevation of said Figure '7 is a detail section taken on the line I--'I of Figure 1;

Figure 8 is a detail section taken on the line 88 of Figure 2;

Figure 9 is a detail perspective view of the retrieving or paper-removing tool, and

Figure 10 is a side elevation of a modified form of the invention. I

Referring specifically to the drawings, wherein like reference characters designate like or similar parts, a suitable frame, preferably rectangular and of wood, is used at I0. Within such frame, a paper table II is provided having depending braces I2 through which a rod or shaft I3 passes,

the table II being adjustable transversely of the frame or axially of said shaft I3 and fastened in adjusted positions by means of screws I4 or the equivalent. The table I I is thus rigidly connected to the shaft I3 and the latter is journaled or rocks in openings I5 and in the side walls of frame Ill. Shaft I3 is held against displacement through the engagement of lugs I6 in endless grooves I! of the shaft, which lugs are carried by screws I8 threaded into the side wall of casing I0.

Said paper table II is'adapted to hold a stack of paper sheets to be printed upon, as at I9 as well as a master sheet uppermost thereon. Such stack I9 is positioned by means of pins 25] rising from the table II at suitable locations, supplemented by a pair of clips 2t) having U-shaped clasp portions 2| detachably engaging one end of such paper table, and having vertical portions 22 for engagement by the paper. The clips 20*, obviously, are adjustable according to variations in the length of the paper of the pile I9. Undue rocking movement of the table II is prevented by transverse stop rods 23 of the frame I0.

Coacting with the said paper table II is a platen 24 preferably having a depression 25, in which a gelatinous or equivalent body 26 is carried. Said platen at one end, is removably engaged in bifurcations 21 of hinge leaves 28, being fastened therein by screws 29 screw-threaded to the leaves 28 and passing through openings 30 in the platen 24. Said hinge leaves 28, by means of horizontal pintles 3| are pivotally connected to attaching leaves 32 fastened as at 33 against the interior of one end wall of said casing I0. Such end wall at the top is slotted or cut away as at 34 to provide clearance,'so that the platen may be swung to and from horizontal positions with the platen uppermost or the gelatinous surface 26 uppermost. The paper table at the same end of the device is also cut away as at 35 to provide clearance which will not interfere with working of any of the parts.

In the operation of the device the previously mentioned master sheet is placed uppermost on the pile or stack I9 whereupon the platen is lowered with the gelatinous surface 26 in contact with the transfer surface of the master sheet, whereupon the platen is swung upwardly and outwardly to the extent of 180 degrees, the master sheet adhering to the gelatinous material and being uppermost in the outwardly swung position of the platen. Such master sheet is permitted to remain on the gelatinous material 26 until the ink has been sufficiently absorbed, whereupon the master sheet is retrieved or removed by the use of a tool as disclosed in Figure 9. Such tool comprises a pairof levers 36, pivotally connected by a pin at 31, and having extended gripping jaws 38 of a length best adapted to the width of the paper to be removed or retrieved. The jaws 38 are normally urged into separating position by an expansive spring 39 suitably anchored and interposed between the handles 40 of the retrieving tool.

After the gelatinous material has absorbed the ink, and the master sheet then removed, such platen may be moved downwardly against the pile of paper sheets I9 with relative rocking movement occurring between the platen and paper table on the respective axes 3| and I3, an effective printing impression being made on the uppermost sheetof the stack I9, whereupon the platen is again swung I80 degrees and the printed sheet removed by the retrieving tool of Figure 9. Successive operations of the platen effects printing of the successive sheets of the stack or pile I9. The invention particularly enables the prestacking or positioning of a plurality of sheets.

A handle of suitable construction and generally designated 4! may be secured to the platen adjacent the free end thereof as by means of screws 42. This handle 4|, however, is interchangeable, so as to be applicable to one end of the frame I0, when the device is stored or being moved from place to place. the casing is provided with screw-threaded openings as at 43, into which the screws 42 may be threaded, as shown in Figure 6.

A. suitable cover or closure may be provided across the top of the device if desired as shown at 44. Such cover, for example, may be made of sheet metal, and rests on hooks or the like 45 at one end of the casing, and at the other end of the casing have openings 46 through which the previously mentioned bolts 42 pass.

The platen may be moved out of operative position when desired, and for instance completely detached by removing screws 29. Thereafter, the platen, may be housed in the lower portion of the casing by having its longitudinal edge portions slidably engaged in grooves 48 of rails 49 fastened'within the casing and adjacent the longitudinal walls thereof, the retention being aided by frictional engagement with expanded leaf springs 50 fastened at to the rails.

If desired, the platen may be stored in its operative position in which event, L-shaped latches 52 may be swung into retaining engagement therewith as shown in Figure 6. Such latches are pivotally connected against the inner surfaces of an end wall of casing by pivot members =53, and they normally are in intimate contact with such end wall and the adjacent side walls, being out of interfering relation with any of the operating parts.

A modified form of the duplicator is shown in Figure 10 wherein a paper table 60 is provided having upstanding. pins 61 thereon positioning a pile or stack of sheets of paper at 62. A platen 63 is adapted to coact with the table 60 and it has a gelatinous body 64 thereon to coact with a master sheet in the same manner as the gelatinous body 26 coacts with a master sheet superposed on the pile of sheets l9. Such platen, however, intermediate its ends, is pivoted by a rod 65 on a frame 66, which in turn is pivoted at 61, to a raised part 68 on the base 60. It will be realized that the frame 66 may be swung 180 degrees or substantially so on the pivot $1 for the same coaction between the sheets '62 and the master sheet and gelatinous body 64 as between the sheets l9, master sheet and gelatinous body Various changes may be resorted to provided they fall within the spirit and'scope of the invention.

What is claimed is:-

1. A duplicator of the class described having To this end, the said end wall of 2. A duplicator of the class described having a paper table, means pivotally mounting said paper table, a platen, means pivotally mounting said platen, said-platen containing a transfer surface facing said paper table and movable into engagement with paper on said table, projections rising from said paper table to position the paper there- :on, said projection being outside of the zone of movement of the platen, means operable to limit the pivotal movement of the paper table, said paper table at one end thereof having a plurality of removable clasps thereon, said clasps having upstanding portions for abutment by the paper.

3. A duplicator of the class described comprising a frame, a paper table pivotedwithin and to the frame, means on said table to position paper sheets, and a platen pivoted to the frame having a transfer surface to engage the paper sheets, said means being outside of the zone of movement of said platen.

4. A duplicator of the class comprising a frame, a paper table pivoted within and to the frame, means on said table to position paper sheets, a platen pivoted to the frame having a transfer surface to engage the paper sheets, means to adjustably secure the paper table to its axis means, means on the casing limiting movement of the paper table, and means operable to secure the platen against accidental opening.

5. A duplicator of the class described comprising a frame, a paper table, hinges pivoting said paper table within and to the frame, means on said table to position paper sheets, a platen pivoted to the frame having a transfer surface to, engage the paper sheets, said hinges having bifurcation interfitted with said platen, means detachably fastening theplaten in said bifurcation of the hinges, and the casing being cut away adjacent the hinges to enable the platen to be swung outwardly of the casing.

6. A duplicator of the class described comprising a frame, a paper table pivoted within and to the frame, means on said table to position paper sheets, a platen pivoted to the frame having a transfer surface to engage the paper sheets, the pivotal mounting means for the platen being hinges secured to the frame, means detachably connecting the platen to .said hinges and the casing being cut away adjacent the hinges to enable the platen to be swung outwardly of the casing, rails in the lower portion of the casing, one end wall of the casing being cutaway, and said platen being applicable through said cut away portion and to said rails.

7. A duplicator of the class described comprising a frame, a paper table pivoted within and to the frame, means on said table to position paper sheets, a platen pivoted to the frame having a transfer surface to engage the paper sheets, the pivotal mounting means for the platen being hinges secured to the frame; means detachably connecting the platen to said hinges and the casing being cut away adjacent the hinges to enable the platen to be swung outwardly of the casing, a handle, means to secure the handle to said platen, a cover for the frame, said cover and adjacent wall' of the casing having openings to accommodate said fastenings, whereby the handle is interchangeable.

MARSHALL HURST. 

